[Ozzie Goat]

Is your box MSD 6AL ??

Long story short, it was recommended to me that if that RED wire (ignition lead) is hot then the box needs to be repaired if there is not spark from the coil wire.

SO, it was suggested that I purchase a new 6AL and install that.
Take the wounded 6AL and send to MSD for refurbishment.
Apparently, MSD takes a while to repair these boxes and they often fail.
If you have a car with a 6AL, it might make sense to always have a backup (the repaired unit).

That's what I've learned, hope that helps.